/* Broadcom NetXtreme-C/E network driver.
*
* Copyright (c) 2023 Broadcom Limited
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*/
#include <linux/dev_printk.h>
#include <linux/errno.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/pci.h>
#include "bnxt_hsi.h"
#include "bnxt.h"
#include "bnxt_hwrm.h"
#include "bnxt_hwmon.h"
void bnxt_hwmon_notify_event(struct bnxt *bp)
{
u32 attr;
if (!bp->hwmon_dev)
return;
switch (bp->thermal_threshold_type) {
case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_WARN:
attr = hwmon_temp_max_alarm;
break;
case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_CRITICAL:
attr = hwmon_temp_crit_alarm;
break;
case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_FATAL:
case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_SHUTDOWN:
attr = hwmon_temp_emergency_alarm;
break;
default:
return;
}
hwmon_notify_event(&bp->pdev->dev, hwmon_temp, attr, 0);
}
static int bnxt_hwrm_temp_query(struct bnxt *bp, u8 *temp)
{
struct hwrm_temp_monitor_query_output *resp;
struct hwrm_temp_monitor_query_input *req;
int rc;
rc = hwrm_req_init(bp, req, HWRM_TEMP_MONITOR_QUERY);
if (rc)
return rc;
resp = hwrm_req_hold(bp, req);
rc = hwrm_req_send_silent(bp, req);
if (rc)
goto drop_req;
if (temp) {
*temp = resp->temp;
} else if (resp->flags &
TEMP_MONITOR_QUERY_RESP_FLAGS_THRESHOLD_VALUES_AVAILABLE) {
bp->fw_cap |= BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED;
bp->warn_thresh_temp = resp->warn_threshold;
bp->crit_thresh_temp = resp->critical_threshold;
bp->fatal_thresh_temp = resp->fatal_threshold;
bp->shutdown_thresh_temp = resp->shutdown_threshold;
}
drop_req:
hwrm_req_drop(bp, req);
return rc;
}
static umode_t bnxt_hwmon_is_visible(const void *_data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
const struct bnxt *bp = _data;
if (type != hwmon_temp)
return 0;
switch (attr) {
case hwmon_temp_input:
return 0444;
case hwmon_temp_max:
case hwmon_temp_crit:
case hwmon_temp_emergency:
case hwmon_temp_max_alarm:
case hwmon_temp_crit_alarm:
case hwmon_temp_emergency_alarm:
if (!(bp->fw_cap & BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED))
return 0;
return 0444;
default:
return 0;
}
}
static int bnxt_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
int channel, long *val)
{
struct bnxt *bp = dev_get_drvdata(dev);
u8 temp = 0;
int rc;
switch (attr) {
case hwmon_temp_input:
rc = bnxt_hwrm_temp_query(bp, &temp);
if (!rc)
*val = temp * 1000;
return rc;
case hwmon_temp_max:
*val = bp->warn_thresh_temp * 1000;
return 0;
case hwmon_temp_crit:
*val = bp->crit_thresh_temp * 1000;
return 0;
case hwmon_temp_emergency:
*val = bp->fatal_thresh_temp * 1000;
return 0;
case hwmon_temp_max_alarm:
rc = bnxt_hwrm_temp_query(bp, &temp);
if (!rc)
*val = temp >= bp->warn_thresh_temp;
return rc;
case hwmon_temp_crit_alarm:
rc = bnxt_hwrm_temp_query(bp, &temp);
if (!rc)
*val = temp >= bp->crit_thresh_temp;
return rc;
case hwmon_temp_emergency_alarm:
rc = bnxt_hwrm_temp_query(bp, &temp);
if (!rc)
*val = temp >= bp->fatal_thresh_temp;
return rc;
default:
return -EOPNOTSUPP;
}
}
static const struct hwmon_channel_info *bnxt_hwmon_info[] = {
HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
HWMON_T_EMERGENCY | HWMON_T_MAX_ALARM |
HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM),
NULL
};
static const struct hwmon_ops bnxt_hwmon_ops = {
.is_visible = bnxt_hwmon_is_visible,
.read = bnxt_hwmon_read,
};
static const struct hwmon_chip_info bnxt_hwmon_chip_info = {
.ops = &bnxt_hwmon_ops,
.info = bnxt_hwmon_info,
};
static ssize_t temp1_shutdown_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bnxt *bp = dev_get_drvdata(dev);
return sysfs_emit(buf, "%u\n", bp->shutdown_thresh_temp * 1000);
}
static ssize_t temp1_shutdown_alarm_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bnxt *bp = dev_get_drvdata(dev);
u8 temp;
int rc;
rc = bnxt_hwrm_temp_query(bp, &temp);
if (rc)
return -EIO;
return sysfs_emit(buf, "%u\n", temp >= bp->shutdown_thresh_temp);
}
static DEVICE_ATTR_RO(temp1_shutdown);
static DEVICE_ATTR_RO(temp1_shutdown_alarm);
static struct attribute *bnxt_temp_extra_attrs[] = {
&dev_attr_temp1_shutdown.attr,
&dev_attr_temp1_shutdown_alarm.attr,
NULL,
};
static umode_t bnxt_temp_extra_attrs_visible(struct kobject *kobj,
struct attribute *attr, int index)
{
struct device *dev = kobj_to_dev(kobj);
struct bnxt *bp = dev_get_drvdata(dev);
/* Shutdown temperature setting in NVM is optional */
if (!(bp->fw_cap & BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED) ||
!bp->shutdown_thresh_temp)
return 0;
return attr->mode;
}
static const struct attribute_group bnxt_temp_extra_group = {
.attrs = bnxt_temp_extra_attrs,
.is_visible = bnxt_temp_extra_attrs_visible,
};
__ATTRIBUTE_GROUPS(bnxt_temp_extra);
void bnxt_hwmon_uninit(struct bnxt *bp)
{
if (bp->hwmon_dev) {
hwmon_device_unregister(bp->hwmon_dev);
bp->hwmon_dev = NULL;
}
}
void bnxt_hwmon_init(struct bnxt *bp)
{
struct pci_dev *pdev = bp->pdev;
int rc;
/* temp1_xxx is only sensor, ensure not registered if it will fail */
rc = bnxt_hwrm_temp_query(bp, NULL);
if (rc == -EACCES || rc == -EOPNOTSUPP) {
bnxt_hwmon_uninit(bp);
return;
}
if (bp->hwmon_dev)
return;
bp->hwmon_dev = hwmon_device_register_with_info(&pdev->dev,
DRV_MODULE_NAME, bp,
&bnxt_hwmon_chip_info,
bnxt_temp_extra_groups);
if (IS_ERR(bp->hwmon_dev)) {
bp->hwmon_dev = NULL;
dev_warn(&pdev->dev, "Cannot register hwmon device\n");
}
}
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